Why is the belt loose on my Ryobi Belt Sander?

Loose belt after tensioning 

If the belt remains loose even after pushing back the tensioning lever, it is most likely because the belt is too large. 

Check belt size 

Belt sanders come in several sizes, and belts are not interchangeable. 

Compatible Belt Sizes 

• 18V ONE+ Belt Sander (R18BS-0) and all previous cordless models: 

            76 mm × 457 mm belt size. 

• 800W Belt Sander Variable Speed (EBS800V) and all previous corded models: 

            76 mm × 533 mm belt size.

Refer to your owner’s manual to confirm the correct belt size for your model.